Shock-absorber.



G. G.' BECK.

$11001: ABSORBER.

APPLIOATIOK FILED JAN. 28, 1913.

Patented Dec. 9, 1918.

mamas.

1 Fig. 4 is a face view of one of the cam mem- UNITED STATES Gnome c.imcx, or secure, wasnmcron.

snags-insomn a.

' Patented Dec.9,1913.

. Application at January 2 1913. sem no. 744,680. i

- To all w emit mag/consent: y it -Be it-vlmown that 1,.Gnoacn 0. Been,a

---eitizen-' of the United States, residin at kane, in the county ofSpokane and tate .5 "0 -Washington, have invented certain new Ta.ndfiuseful-Improvements in Shock-Absorbeisi'of which the following isa specification. This invention relates to devices used in connectionwith the supporting springs of vehicles for preventing excessivevibration or bounding :ot'thewehicle body, and more particularly thattype of devices comprising two pivotally connected members havingfriction means at their joint for resisting relative movement of themembers, one of which latter is connected to'the body of the vehicle andtheother to the running gear.

It is the object of the present invention to provide novel and improvedmeans whereby the resistance is automatically increased in directproportion tothe amplitude of the vibrations of the vehicle body, sothat the greater the bound, the greater'will be the force tendingtoresist the same. This obpartly in section, the sections being takenthrough the pivotal connection between the two members of the device,and the pivotal connect-ion of-the upper one of said moor. bers with therunning gear of the vehicle. Fig.' 2 shows the device in position on thecar. Fig. 3 is an elevation of a dust guard.

bers. Fig. 5 is an elevation of both cam members showing the sameseparated. Fig.

6 is a face view of the other cam member; Fig. 1 is an. elevation of oneof the. supporting members of the device. Fig. 8 is an end view and-anelevation of a bushing, Fig.5) is an elevation of a spring. Fig. 10 isan elevation of a pivot bolt, and F lg. 11 is an end view "thereof. Fig.12 is a perspective; view of the first-mentioned cam memben; Fig. 13 isa perspective viewshowinga slight modification of said cam member.

As shown in the drawings, the device comprises two pivotall y connectedsupporting members one otwhich is connected to the running gear and theother to the body of the vehicle. two parallel arms, the arms of onemember being indicated by the reference characters ject is attained bythe construction illus Each member is composed of il and2;;espectively,and thearms of the other member by thereferenbecharacters =3 and 4,1'espective1y. At the pivotally con- ,nected ends ofthe two members, the arms thereof have disk-like enlargements, .indi-'catedat l, 2, 3" and 4", respectively. The I arms are all spacedlaterally and arranged 9 in alternate order, the arm2 being between the"arms 3 and 4, and between the enl'argements thereof are located Wood orfiber friction' disks 5, 6 and 7. On the faces of the friction disk 5are metal wear plates 8 havinginturned marginal fianges'9 which overlapon the periphery of said disk, as shown in Fig. -l. The outer faces ofthe friction disks 6 and 7 are provided with metal Wear plates 10 havinginturned marginal flanges 11 engaging, respectively, the peripheries ofsaid disks. The flanges 11 are encircled by a ring'12 Whiehoverlaps thesame and the edge of the part2 of the arm 2, said ring being'secured tothe part 2 by a screw 12. This arrangement of flanges and ring serves toexclude dust and dirt from the friction surfaces' The pivotal connectionbetween the two members is made by a bolt 13 which passes through thecenter of enlarged ends thereof. The head 13 of the bolt is spaced .fromthe outer face of the enlargement 4: of'

the arm 4, and between said parts is interposed a spring c mprising a.contral diskbase of tho boll. hczul. and one of the lingers 14 hasa'lug M which seals inln re ess in thetace oi the part l.

In tho-bolt hole of the friction disks 6 and 1-50 v 7 and the part 2* ofthe arm 2. is a'bushing 15 through which the bolt 13 passes. Thisbushing has end lugs '15 which sent in rccos;-;es in the parts 3 and 4;and in the plate 8 contiguous to the part. 3.

Tho pivot-bolt'lfri projects from the face of the part 1 of the arm Iand on said projecting portion of. the bolt are mounted means forincreasing the frictional contact between the parts 1, 2, 3 and -11andthe 1 parts located thcrebctween, said pal-ls being pressed togetherby the springmember 14,

- Q i I 1,090,745

14, as hereinbefore described, so. that a resistance is offered to thefree movement of Said parts with respect to each other. These means forincreasing the friction comprise two contiguous cam members 16 and 17,re-

spectively, of any suitable diameter, having central openings throughwhich the pivotbolt passes. The cam surfaces are on the contiguous endsof the members. The memher It has an outstanding peripheral fian e 17and a projecting arm 18 terminating in anenlargement 18 having anarcuat'e slot 18". The arm 3 carries a bolt 19, the same being securedby nuts 19 and passing through the slot 18*. Nuts 19" screwed on thebolt against opposite sides of the enlargement 18" secure the arm 18 tothe arm 3. It will therefore be evident that a rotary motion is giventhe cam member 17 when 20 the arm 3 vibrates in response to the motionof the vehicle body.

The inner end of the cam member 16 has v -fastening may be provided,-Which can be rivets, the flange 20 having apertures 23 for this purpose.The plate 8 which is between the friction disk 5 and the part l iscoupled to the cam member 16 by the parts 22 entering notches thereof inthe same manner as the arts 21. i

T e two cam members 16 and 17 are encircled by a dust-excluding shell24: and a felt ring 25 inclosed by the latter, to prevent dust and gritfrom getting between thecontacting cam surfaces of said cam members.

The pivot-bolt 13 has a centrallongitudinal. lubricant duct 26 providedwith lateral branches 26" which lead to the contacting cam surfaces ofthe cam members 16 and 17. The

duct also has lateral branches 26" which register with apertures 27 inthe bushing 15, Which'apertures 27 in turn open into the centralaperture of the part 2 through which the bushing passes. The outer endof the duct is enlarged and into the same is screwed an oil cup 28. Bythe arrangement of the lubricant duct 26 and its branches hereindescribed, the cam surfaces and the J may be kept properly lubricated athe pivot-bolt 13 projects from the cam er l! and on said projecting end,and U the cam member is crewed a not :29 .lor' retaining the pivot btutin place, and

care of by the car springs. The

the bushing 15, and the cam member 16; on

with hubs 323, the inner ends of-whlch l:

for varyin the "jamming action of the at spring-mom er 14., 14.

The lugs 14 and 149 engaging the 13 and 4" prevent the bolt 13 fromturning while adjusting the nut 29, whereby the duct branches 26* areprevented from getting out in of registry with the apertures 27.

The cam members 16 and 17 serve to in crease the friction in directproportion to the amplitude of the vibrations of the ve hicle body. Whenthe highest portions of: the cam surfaces of one member seat in thelowestportions of the cam surface of the other member, the spring-member14, 1.4 exerts its minimum influence to jam the parts together. \Vhenrelative movcn'umt of the arms 1, 2 and 3, 4 takes place, the rumsurfaces mount each other, which jams the parts l 2*, 3 and 4*, and thefriction me" 1., hers therebetween, together, so that the bra tion andthe consequent resistance to 1h turning movement is increased, the Jance increasing until the highest pca'tior one cam surface engage thehiglu st port of the other, at which time a IHFIXlITHlHItH sistance isoffered. When the cam sin-fa move in the opposite direction the rcsistau're decreases until the minimum is reached the highestportions againseat in the lot P portions. Thus the friction increases strokes ctlonger and the bumps This In res an easy riding car and springs can beused without danger o I11. age. Slight vibrations of the car are inallows adjustment of the cam member t obtain the position of minimumfrictic a certain desired load in the carwhca l at a standstill orrunning slowly, ir' tive of the distance between the pol M at attachmentof the device. Adjustment may Mu also be made so that a greater frictionis ob tained on the upward bound than on U! downward bound, or viceversa; or adi. ment may be made so that the friction equal onhot-hbounds. The arm 2 turns-z the pivot-bolt 13. The cam member 16, theplate 8 contiguous to the part 1.", and the ring 12 turn with the parts1'? and 9", and the'parts connected to the parts 3" and 4" 11.; turntherewith. The friction disks :7, (1 vol 7 and the parts 24 and 25 arefree to fur: either direction, irrespective of the am ement of the otherparts.

A bracket 30 mounted on the vehicle carries a pivot-stud 31 for theouter e1 the arms 3 and 4, said ends being for are in contact with eachother. The l of the hubs contain a bushing 3; th which the pivotstudpasses. In coma: 1 the outer and of each hub is a f iction ill; providedwith a wear plate 351 and amnutfi'sscrewed a ainstthe plate 35 ofthe nallubricant duct nut 37 and serves a outer friction di its i; The plateofthe inner" friction disk 34 abuts against the bracket 30. Thus, when thenut is tightened up, the parts 32, 34- and 35 are clamped'together, andthe friction produced therebetween offers a resistance'to the freemove-- ment of the arms 3 and 4..., r

The pivot-stud 31 has a central longitudi-- provided, 'with lateralbranches 38 w:' :ich register with 'apertures 38 in the bushing 33 sothat the lubricant may flow to the contactingportions of the hubs 32. Anoil cup 39 is screwed into the so as a lock-nut for the latter.

A connection similar to the one just do.- scribed is provided betweenthe arms 1 and 2, and the-running gear of the vehicle The bushing 33 hasend lugs 40 entering. recesses in the bracket 30 whereby th bushing isprevented; from turning to bring the duct'branches out of registry withthe apertures 38.

Variou'schanges' and modifications in the structural details may be madeWithout a departure from the spirit and scope of the invention ashereinafter claimed; The lubrieating means may be left olf, if desired."The diameter of the cam members 16 and 17 may 'th at be varied tomeet'difierent conditions or requirements. Fi s.,5 and 12 show'"a two'-point cam.- Av t rec-point cam is shown in Fig. 13. Either form of. cammay be em- P1 y d- 1 Ielaim:

1. shock-absorber comprising a pair of supporting members eachcomprising-ftwol spaced parallel arms, said armsbeing ar-, ranged, inalternate order, a bolt pivotally connecting said supporting members, aspring interposed between, the bolt-head and the adjacent outer'arin ofone of the supporting members, the bolbprojecting from the outer; armoft'theother supporting-member,

a cammdiznied the pmJ q -ing, end-of the bolt and sotothe!last-mentioned arm,

I cam, an-arm extending from, ,'ond; 1ne1itioned cam and adjustablyconnected to the other arnrof the first-mom: tinned supporting member, anut screwedvon the bolt-against the SBCOlld-lIlBfltlQnfi and frictionmembers interposed; betweenthe'arms of thesupporting members at thepivotjoint.

.Qlfmtedon the bolt in contact v supporting members each comprising twospaced parallel arms, said arms beingarsaid spring being coupled to saidarm and to the bolt-head, a nut screwed on the bolt,

. said bolt having a lubricaiitduct provided with a lateral branch,and-the bushing having an aperture registering with said branch, theaperture opening to the arm through which the bushing loosely asses, acam on bolt and coupled to e arm through which the bolt loosely asses, asecond cam on the bolt in contact with the other cam, an arm extendingfrom the second-mentioned cam and adjustably connected to one of thearms to which the aforesaid bushing is (Sou-- pled,=the aforesaid nutbeing screwed on the bolt against the second-mentioned cam, and frictionmembers interposed between the arms of the supporting members at thepivot joint. 3. A shock-absorber comprising a pair of supporting memberseach spaced parallel arms, said arms being'arranged in alternate order,a bolt pivotally connecting said supportingmembers, a s ring interposedbetween the bolt-headand t e adjacent outer arm of one of the suptheouter arm of the other supporting memthe bolt and coupled to thelast-mentioned arm, a secondcam mounted on the bolt in contact with theother cam, an arm extending from the second-mentioned cam and ad-.ju'stably connected to the other arm of the first-mentioned supportingmember, a nut screwed on the bolt against the second-menti'iihed cam,friction members interposed betwgeh the arms of the supporting membersat the, ivot joint, and wear plates on ,o posite' sid ds of the frictionmembers, lpeing the peripheries of the frictionvmemrs. v

.4. A shock-absorber comprising a pair of supporting members each spacedparallel ,arms,-said arms being araged in alternate order, a boltpivotally connecting said' supporting members, a s in interposed betweenthe bolt-head and to a. jacent outer arm of one of the supportingmembers, the bolt projecting from 'the'outer arm of the other supportingmem- 2. A. shock-absorber comprising pair of her, a cam mounted ,on the;projecting end ranged in alternate order, a bolt pivcitally.

the outer one of the last-mentioned arms,

porting members, the bolt projecting from said p ates' having.intu'r'ned 'marginal- ,flanges overlap- COmPIISmg two comprising twoher, a cam mounted on the projecting end of i 4mm ping the peniyherieeof fi'ietion (5f the bolt and coupled to thelut-mentioned arm, a secondcam mounted on the bolt in contact with the other eam, an arm extend ing"from the second-mentioned cam and, adjustably connected to the otherarm of the first-mentioned supporting member, a nut screweden the boltagulnst the .second' men I tiened cam, frictionmembers interposedbetween the arms of the SUPPOlftillg membens at the pivotjolnt, wearplates on opposite sides of the friction members, said pletes. I

having inturned marginal fianges' o'verlap- 1 the flanges o the wearplugs of one of the friction members ov'erla 08011 other 15 fi mhmh anda nag eovering th. wear p in presence 0 two wi Witnessee: i

W. B. Cmnbm, MFR. Seam.

Y GEORGE'C. BECK.

